ex: local disk as dedup destination and right after sent it to tape, like a destage.

So I'll need a DataDomain (example) + Netbackup Lics for dedup

let me expose my test.

I want to backup a lot of small clients/servers geographically distribuited, I'll have to use VPN access, I was trying to send a Media Server to the first backup and bring it back to the DC for the next.

Data Domain will not work with NBU built-in client dedupe (you need MSDP pool or NBU Appliance for this)

If you plan to use DD BOOST over the WAN it is not supported, so Data Domain won't help here

Avamar will do but it is bloody expensive and completely separate backup solution not integrated with NBU.

The best option to my opinion is to use WAN Resiliency (NBU 7.5 and above) for remote clients, small appliances/MSDPs in remote hubs (if any) and optimized duplication to central site using SLP controlled from NBU.

Hummm, I know that DD can't do client side dedup, but I can only dedup a client side if I have a Disk Pool registered at the master server right? so I do not want to put a Storage w/out dedup to do that. thats why I was thinking about the DD.

NB 7.5 + DD(OST and VTL) at the DataCenter.

I'll will mount the DD(OST) as a DiskPool so I'll be able of dedup at client side (NB will do that) and than I'll export to tape.

I'll have to licence the Enterprise Disk, Dedup, Master Media, OST and the application agents.

that is right?

Hard to explain, I was using NB 6.5 and there wasn't Dedup options. I'm newbier than ever